linux-kernel - Re: [RFC PATCH 00/11] Rust null block driver

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Message-ID: <da7b815d-3da8-38e5-9b25-b9cfb6878293@acm.org>
Date:   Wed, 3 May 2023 09:47:25 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Andreas Hindborg <nmi@...aspace.dk>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@....de>,
        Keith Busch <kbusch@...nel.org>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Hannes Reinecke <hare@...e.de>,
        lsf-pc@...ts.linux-foundation.org, rust-for-linux@...r.kernel.org,
        linux-block@...r.kernel.org
Cc:     Andreas Hindborg <a.hindborg@...sung.com>,
        Matthew Wilcox <willy@...radead.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        open list <linux-kernel@...r.kernel.org>, gost.dev@...sung.com
Subject: Re: [RFC PATCH 00/11] Rust null block driver

On 5/3/23 02:06, Andreas Hindborg wrote:
> This is an early preview of a null block driver written in Rust.

It is not clear to me why this effort was started? As far as I know the 
null_blk driver is only used by kernel developers for testing kernel 
changes so end users are not affected by bugs in this driver. 
Additionally, performance of this driver is critical since this driver 
is used to measure block layer performance. Does this mean that C is a 
better choice than Rust for this driver?

Thanks,

Bart.